Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL096739 |
Increased erosion rates following the onset of Pleistocene periglaciation at Bear Meadows, Pennsylvania, USA | |
J. Del Vecchio; R. A. DiBiase; L. B. Corbett; P. R. Bierman; M. W. Caffee; S. J. Ivory | |
2022-01-28 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2022 |
英文摘要 | Direct measurements of erosional response to past climate change are scarce, but mid-latitude landscapes can record how shifts between cold and warm periods altered erosion outside glacial margins. To study hillslope responses to periglaciation, we measured bulk geochemistry and cosmogenic 10Be and 26Al concentrations in colluvium and weathered bedrock in an 18 m regolith core from Bear Meadows, Pennsylvania, ∼100 km south of maximum glacial extent. Using core lithology, cosmogenic nuclide concentrations, and regional 10Be-derived erosion rates, we show the onset of 100-kyr glacial cycles at the Mid-Pleistocene Transition (1.2–0.7 Ma) instigated multiple periglacial episodes in central Appalachia, increasing erosion rates compared to the relatively warmer Neogene. Our results show the higher efficiency of periglacial versus temperate erosion processes and highlight a pervasive Pleistocene periglacial erosion signal preserved in the 10Be inventory of surface sediments in central Appalachia, where erosion rates are slow enough to integrate previous cold-climate processes. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/346064 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | J. Del Vecchio,R. A. DiBiase,L. B. Corbett,et al. Increased erosion rates following the onset of Pleistocene periglaciation at Bear Meadows, Pennsylvania, USA[J]. Geophysical Research Letters,2022. |
APA | J. Del Vecchio,R. A. DiBiase,L. B. Corbett,P. R. Bierman,M. W. Caffee,&S. J. Ivory.(2022).Increased erosion rates following the onset of Pleistocene periglaciation at Bear Meadows, Pennsylvania, USA.Geophysical Research Letters. |
MLA | J. Del Vecchio,et al."Increased erosion rates following the onset of Pleistocene periglaciation at Bear Meadows, Pennsylvania, USA".Geophysical Research Letters (2022). |
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